phpPgAdmin is a fully functional web-based administration utility for a PostgreSQL database server. It handles all the basic functionality as well as some advanced features such as triggers, views, and functions (stored procs)

VFront is a dynamic front-end for MySQL, PostgreSQL and SQLite databases written in PHP and Javascript. With VFront you can create forms for manage data in AJAX style, rules and privileges for differents groups, reports ,statistics and much more

jose is a graphical Chess tool.
You can store chess games in a database.
You can view and edit games (including variations and comments).
You can play against a plugged-in chess engine and use it for analysis.
Features 3D board view.

SIDU is a FREE database web GUI written in PHP. Handy and powerful for MySQL + PostgreSQL + SQLite + CUBRID. SIDU is simple and easy DB tool to use! SIDU has all features you need for database admin and web development. It's a great DB admin tool! No installation need. Best database front-end web based tools, cross platform looking no further

DaDaBIK is a PHP application that allow you to easily (you need just to specify some configuration parameters) create an higly customizable a highly customizable front-end for a database in order to search, insert, update and delete records.